Statistical analysis For communities.

1.    The table below shows the random samples of median household incomes by community  ($1,000, 1999)

COMMUNITY
1    2    3    4
522    519    527    570
533    582    543    581
521    574    521    611
502    581    555    591
513    599    581
521    605
595

Conduct an analysis of variance (ANOVA), discuss if the median household incomes differ by community.